Rikei ga Koi ni Ochita no de Shoumei shitemita. Heart

Science Fell in Love, So I Tried to Prove It r=1-sinθ, Science Fell in Love, So I Tried to Prove It 2nd Season, Rikekoi, Rikei ga Koi ni Ochita no de Shoumei shitemita. r=1-sinθ